Machine for end grinding conical rolls



May 4 1926.

H. VAN ERBEEK MACHINE FOR END GRINDING CQNICAL ROLLS Filed July 30, 1923 2 Sheets-Sheet 1 May 4 1926.

H. VANDERBEEK MACHINE FOR END GRINDING CONICAL ROLLS Filed July :50, 1925 .2 Sheets-Sheet 2 60 s fiiiorvze Patented May 4, '1926. i

UNITED srATEs l,5&3,205

PATENT oraics.

HERBERT VANDERBEEK, OF CANTON, OHIO, ASSIGNOR TO THE TIlillKEN ROLLEB BEARING COMPANY, 01E CANTON, OHIO, A. CORPORATION OF OHIO.

MACHINE FOR END GRINDING CONICAL ROLLS.

Application filed July 30, 1823. Serial No. 654,515.

' and useful Improvement in Machines for I pawl and ratchet.

End Grinding Conical Rolls, of which the following is a specification.

Heretofore it has been common practice, in grinding the end of a conical roll for roller hearings, to disregard the size. of the large end of the finished roll and to sort the rolls aftergrinding. The disadvantage of this practice of grinding without regard to its nished size is that the size of the finished roll may fall at any point between the limits that separate one lot from the next so that most of the rolls 'wil-l deviate appreciably from the standard set for said lot. The object of the present invention is-to minimize the deviation of the rolls from the standards of their lot; and it whereby the ends of. the rolls are round with reference to definite standards instead of being ground at random as heretofore. The invention also consists in providing a grindin machine with means whereby the roll to ground is automatically so positioned with relation to the grinder that the ground roll will approximate the lot standard automatically selected by the positioning means. It also consists in the parts and in the combinations of parts hereinafter de-' scribed and claimed.- I

in the accom anying drawing, wherein like numerals re; er to like parts wherever they occur,

Fig. 1 is an elevation of a grinding machine embodying my invention,

Fig. 2 is a plan view thereof, and

Fig. 3 is a detail view of the-indexing The machine illustrated in the accompanying drawing comprises a framework 1 wherein which the operating artsare mounted. Rotably journaled on t is framework is a hollow horizontal s indle 2, which is provided with a belt pu ey 3 or other suitable means whereby it is connected to a suitable source of wer to be driven thereby. The spindle is slidable endwise in its bearings 4 to a limited extent. The spindle 2 is provided with a collar 5 rigidly fixed thereto so as to be movable therewith, and

the end of the roll this collar is adapted .to bear againstthe,

end of one of the journal bearings 4or mounting frame and thus limit the forward or return movement of the spindle, i. e. the movement towards the work feeding device hereinafter described. The spindle is normally held in its forward position as hereinafter described. I

The front end of the spindle 2 is provided with a horizontally disposed seat or conical socket 8 open at its large end and. adapted to receive a conicalroll 9 partway therein. The roll is delivered into said seat or socket by a horizontal movement, preferably by an automatic feeding-device. The feeding. device illustrated in the drawing comprises a cradle in the form of a block 10 that is mounted on a slide 11 that works trans- Versely of the axis of the spindle 2 a suitable slideway 12 provided on the framework for said slide. The block 10 has a roll seat 18, which is open at its ends and v also to a feed chute'14 by means of evh'ich the rolls are fed to the roll seat 13' on the block. Said roll' se-at 13 isso located as to beclose to and in axial'alinement with said spindle 2 and the conical roll seat 8 thereon cradle is in its forward position is in axial alinement with said spindle socket 8 and roll 9. The slide operating mechanism indicated in the drawings comprises a lever 16 secured to the slide 11 and pivotally mounted on the framework l and steam 17 mounted on a shaft- 18 and engaging the end of said lever 16 to operate it.

Mounted on the framework opposite the spindle is adevice that'is adapted to cooper-.

ate'with said reciprocatable rod 15 so as to move the same endwise and thereb force the roll 9 in the roll seat 13 partway into the socket 8 of the spindle 2, whereupon the cradle is moved backwardly into position to receive a new roll, thus leaving the field clear for the movement of the grinding mechanism. The mechanism shown in the drawings comprises a slidable member 19 having a projecting ram 20 in axialalinement with the spindle 2 and rod 15 when the slide 11 is inv its forward position and adapted to force it toward the spindle 2 to feed" the roll from the roll seat 13 into the socket 8 of the spindle 2. The slide 19 is provided with an operating lever 21 that is operated by a cam 22 on the shaft 18. The ram 20 extends through a bearing member 23 that has a bushing 24: threaded therein. The bushing 24 engages a collar 25 on the rain to limit the stroke thereof and may be adjusted to change the stroke of said ram. A heavy spring 26 mounted in said slidable member and engaging said ram permits movement of the slidable member after the ram has been stopped.

The grinding mechanism comprises a grinding wheel 27 rotatably mount-ed on a slide 28 that works in slideways mounted on the slide 11 said slideways being preferably set at such inclination with reference to the axis of the spindle 2 as may be required for producing the proper angle to the front portion of the end of said roll. Suitable means may be provided for adjusting the portion of the grinding wheel on the slide. It is noted that the movement of the slide 11 carries the grindin wheel out of the path 'of the ram 20 permitting a roll to be inserted in the pocket 8 and that the slide returns to its normal position as soon as the roll has been inserted, bringing the grinding wheel into operative position.

It is noted that in this construction, the movement of the slide 28 causes the grinding Wheel 27 to move transversely of the axis of the roll 9 along a path determined by the slideways and consequently that the i the framework.

amount of grinding effected thereby is dependent upon the position of the roll. Accordingly, I have providedmcans forproperly positioning the roll with reference to the grinder. Mounted so as to be movable endwise with the spindle but incapable of rotation is a rack 29 which engages a pinion 30 which in turn is mounted on a shaft 31 disposed in a plane transversely of said spindle and rotatably mounted in bearings 32 provided therefor on a fixed portion of The rack may be mounted on a sleeve 33 on the spindle that is held against rotation but is keyed to the spindle to move endwise therewith. Fixed to the shaft 31 is an elongated arm 34 which carries an arcuate ratchet 35 on its end in position to cooperate with a pawl 36 that is pivotally mounted on the framework or other suitable portion of the machine so as to automatically engage the teeth of said ratchet 35. By this arrangement, pressure endwisc on a roll 9 seated in the socket 8 in the forward end of the spindle 2 causes said spindle to be moved backward, and

messes against the shoulder of the ratchet tooth,

it will permit the spindle to move forwardly the amountrequired to bring the pawl into engagement with the shoulder of the tooth; that is to say, it will permit a return movement of the ratchet (and of the spindle) sullicient for the pawl to slide on the inclined portion of the ratchet tooth far enough to bring said pawl up against the shoulder thereof.- Thus the pawl is effective to stop the movement of the spindle at definite intervals depending upon the length of the ratchet teeth and the length of the ratchet arm.

he various positions of the spindle thus determine how much of the roll is subjected to the operation of the grinding wheel. For instance, assuming that the teeth of the ratchet are numbered consecutively, the positions of the spindle that correspond with these numbers, and all rolls ground when the spindle is in any particular position will have large ends of the same diameter, excepting, of course, such little variation as may be inevitable in practice. As all of the rolls ground in the machine confornrto one or another of the graduations of the spindles positions, the rolls of each lot approximate the standard of that lot much more closely The device illustrated in the accompanying drawing for ejcctiiig a roll from the spindle socket comprises a rod 37 located axially in the spindle 2and projecting from the rear end thereof. The knock-out rod is provided with an operating lever 38 that is operated by a cam 39 on the shaft 18. The knock-out rod 37 has an extension 40 that is secured to the end of the pawl 36 so that when the roll has been ejected from the spindle, the pawl is moved away from the ratchet, thus permitting the spindle to move forward.

Any suitable means may be used for properly correlating the distributing chutes with the spindle. In the accompanying drawing,

Ian

the chutes 41 corresponding with. the, several positions of the spindle are mounted on a rotatable drum 42 which'is operatively connected to the spindle indexing mechanism to receive motion therefrom. A link '43 is secured to the ratchet arm 34 and to the end of a lever 44 that is pivotally secured to the framework. The other end of the lever 44 isconnected with an arm 45 that is secured to the drum; so that as the ratchet arm' is moved, the drum is rotated.

I do not wish to be limited to the mechanismhereinbefore described as my invention admits of great variation from the construction shown. j

What Iclaimisz. 1. In a machine of the kind described, a work positioning means comprising a rotatable work'holder slidable axially from norv mal position, and automatic means for indexing said work holder longitudinally ac cording to. the size of the work andkeeping said work holder in its indexed position throughout the operation on the work in said holder.

2. In a machine of, the kind described, a

' work positioning means comprisin a rota table work holder slidable axially" rom nor mal position, and work-controlled means for indexing said 'work holder longitudinallyat graduatcd'position's, and means-for keeping said work holder ata definite'graduated position throughoutthe operation ofi the work in said holder.

'3. A machine for end-grinding r '11s comprising a rotatable spindle having an axial roll seat in its forward end, yieldable means for holding said spindle in forward position, automatic means forindexing said spindle longitudinally according to the size of the work at graduated. positions, and means for keeping said roll seat at a definite graduated osition throughout the operation on the r0 1 therein.

4. A machine for end-grinding rolls com prising a rotatable spindle having an axial roll'seat in'its forward end, yieldable means for holding said spindle-in forward position,

means for pushing a roll into said seat and thereby sliding said spindle backwardly to an extent dependingon th'edistance" said roll projects out of said roll seat, automatic means for indexing said spindle longitudinally according to the size of the roll, grinding means slidable transversely of the axis I of said spindle, andmeans for keeping said roll seat in definite indexed position I throughout the operation on theroll in said seat. i y

5.- In a machineof the kind described, a work positioning means'comprising a rotatable work holder slidably axially from normay position, means for returning said work holder to normal position, means operable endwise against the work in said holderto slide said holder to an extent depending on the length of the portion of the work that projects endw'ise beyond said holder, and means for stopping the return movement of saidwork holder short of fits'normal position.

6. In a machine of work positioning means comprising a rotatable Work holder slidable axially from normal position and means for returning prising a rotatable spindle slidable axially from normal position andhaving an axial roll seat in the forward end thereof, and means for indexing said spindle longitudinally, said indexingmeans comprising. a member operatively connected to said spindle .to be moved by the longitudinal the kind described, a

movement thereof and a second -member adapted uponthe forward movement of said spindle to interlock with said first member.

8. A machine for end-grinding rolls conipi'ising arotatable spindle slidable axially from norinal'position and having 'an axial roll seat in the forward end thereof, and meansfor indexing said spindle longitudinally, said indexing means comprising aratchct operatively connected to said spindle thereof and a pawl adapted upon the forward movement of said spindle tov inter-e lock with said ratchet and stop such forward movement.- I

9."A machine for end-grinding rolls comprising a rotatable spindle slidable axially from normal positionandhaving anaxial roll seat in the forward end thereof, means for indexing said spindle longitudinally and means for knocking out the roll from said roll seat, said indexing means comprising a member operatively connected to, said spindle to be moved by the longitudinal ;to be moved by the longitudinal movement movement thereof and a second member adapted upon the forward movement of said spindle to interlock with said first member, said second member being-operatively connected to said knock-out means to be actuated-thereby to disengage said first member.

10. A machine for end-grinding rolls comprising a rotatable spindle slidable axially from normal position and having an axial roll seat in the forward end thereof, roll assorting means operatively connected to said spindle to be controlled by the longi-' tudinal movement thereof, and means for 4 indexing said spindle longitudinally, said:

' indexing means comprising a member operatiyely "connected to said spindle to be moved by the longitudinal movement thereof and a second member adapted upon the forward movement of said spindle to inter: lock with said first member to stop such forward movement.

11. A machine for end-grinding rolls comprising a-rotatable spindle having an axial roll seat in its forward end, yieldable means for holding said spindle in forward position,

means for inserting a roll into said seat and thereby moving said spindle endwis'e, means for indexing said spindle longitudinally. and grinding means slidable transversely of the axis of said spindle, said-roll-insert ing 'means having a constant stroke whereby the endwise movement of said spindle varies with the extent to which the roll projects therefrom. i i

12. A grinding machine comprising a rotatable member having a conical socket in be set thereby, means for grinding the-end of a roll that projects beyond a predetermined distance from said socket, and means for ejecting the ground roll from said socket to the distributing means.

13. Ina machine of the kind described, a-

work positioning means comprisin a rotatstroke of said reciprocable member and means for limiting the return, movement of said work holder.

14. In a machine of the kind described, a work positioning means comprising a rotatable work holder slidable axially from normal position, automatic means for indexing said work holder longitudinally according to the size of the Work, means for distributing the finished work operatively connected with said indexing means to be set thereby, and means for ejecting the work'from said work holder to. said distributing means.

Signed at Canton, Ohio, this 26th day of July, 1923.

HERBERT VANDERBEEK. 

